F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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F01L
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
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F01L9/00
Valve-gear or valve arrangements actuated non-mechanically
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F01L9/10
by fluid means, e.g. hydraulic
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